2, 3, 5. examination. T rial , experiment , test imply an attempt to find out something or to find out about something. T rial is the general word for a trying of anything: articles sent for ten days' free trial. E xperiment is a trial conducted to prove or illustrate the truth or validity of something, or an attempt to discover something new: an experiment in organic chemistry. T est is a more specific word, referring to a trial under approved and fixed conditions, or a final and decisive trial as a conclusion of past experiments: a test of a new type of airplane.4. endeavor, essay, struggle. 7. grief, tribulation, distress, sorrow, trouble, hardship. See affliction.

trial

n.

mid-15c., "act or process of testing," from Anglo-French trial, noun formed from triet "to try" (see try). Sense of "examining and deciding a case in a court of law" is first recorded 1570s; extended to any ordeal by 1590s. As an adjectival phrase, trial-and-error is recorded from 1806. Trial balloon (1939) is congnate of French ballon d'essai.